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Non-controlling Interest | 9 Months Ended
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Sep. 30, 2018
Noncontrolling Interest [Abstract] |
Non-controlling Interests | Non-controlling Interests Non-controlling interests consist of the ownership interests of non-controlling shareholders in consolidated entities and are presented separately on the balance sheet. The following table presents the balance of non-controlling interests included in White Mountains’s total equity and the related percentage of each consolidated entity’s total equity owned by non-controlling shareholders as of September 30, 2018 and December 31, 2017:
|  | September 30, 2018 |  | December 31, 2017
$ in millions |  | Non-controlling Percentage |  | Non-controlling Equity |  | Non-controlling Percentage |  | Non-controlling Equity
Other, excluding mutuals |  |  |  |  |  |  |  |
HG Global |  | 3.1 | % |  | $ | 14.8 |  |  | 3.1 | % |  | $ | 15.9 |
NSM |  | 5.0 |  |  | 14.1 |  |  | — |  |  | — |
MediaAlpha |  | 37.8 |  |  | 15.3 |  |  | 35.7 |  |  | 13.1 |
Buzzmove |  | 22.9 |  |  | 1.5 |  |  | 22.9 |  |  | 2.5 |
Total other, excluding mutuals |  |  |  | 45.7 |  |  |  |  | 31.5 |
Mutuals |  |  |  |  |  |  |  |
BAM |  | 100.0 |  |  | (190.1 | ) |  | 100.0 |  |  | (163.2 | )
Total non-controlling interests |  |  |  |  | $ | (144.4 | ) |  |  |  | $ | (131.7 | )

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- Definition The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -URI http://asc.fasb.org/topic&trid=2197479 + Details
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- References No definition available. + Details
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